Call bochs_unload via drm_driver.release to make sure we release stuff
when it is safe to do so. Use drm_dev_{enter,exit,unplug} to avoid
touching hardware after device removal. Tidy up here and there.
Signed-off-by: Gerd Hoffmann <[email protected]>
---
drivers/gpu/drm/bochs/bochs_drv.c | 6 +++---
drivers/gpu/drm/bochs/bochs_hw.c | 24 +++++++++++++++++++++++-
2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 10460878414e..addb0568c1af 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -23,7 +23,6 @@ static void bochs_unload(struct drm_device *dev)
bochs_kms_fini(bochs);
bochs_mm_fini(bochs);
- bochs_hw_fini(dev);
kfree(bochs);
dev->dev_private = NULL;
}
@@ -69,6 +68,7 @@ static struct drm_driver bochs_driver = {
.major = 1,
.minor = 0,
DRM_GEM_VRAM_DRIVER,
+ .release = bochs_unload,
};
/* ---------------------------------------------------------------------- */
@@ -148,9 +148,9 @@ static void bochs_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
+ drm_dev_unplug(dev);
drm_atomic_helper_shutdown(dev);
- drm_dev_unregister(dev);
- bochs_unload(dev);
+ bochs_hw_fini(dev);
drm_dev_put(dev);
}
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
index b615b7dfdd9d..952199cc0462 100644
--- a/drivers/gpu/drm/bochs/bochs_hw.c
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -4,6 +4,7 @@
#include <linux/pci.h>
+#include <drm/drm_drv.h>
#include <drm/drm_fourcc.h>
#include "bochs.h"
@@ -194,6 +195,8 @@ void bochs_hw_fini(struct drm_device *dev)
{
struct bochs_device *bochs = dev->dev_private;
+ /* TODO: shot down existing vram mappings */
+
if (bochs->mmio)
iounmap(bochs->mmio);
if (bochs->ioports)
@@ -207,6 +210,11 @@ void bochs_hw_fini(struct drm_device *dev)
void bochs_hw_setmode(struct bochs_device *bochs,
struct drm_display_mode *mode)
{
+ int idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
+
bochs->xres = mode->hdisplay;
bochs->yres = mode->vdisplay;
bochs->bpp = 32;
@@ -232,11 +240,18 @@ void bochs_hw_setmode(struct bochs_device *bochs,
bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
+
+ drm_dev_exit(idx);
}
void bochs_hw_setformat(struct bochs_device *bochs,
const struct drm_format_info *format)
{
+ int idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
+
DRM_DEBUG_DRIVER("format %c%c%c%c\n",
(format->format >> 0) & 0xff,
(format->format >> 8) & 0xff,
@@ -256,13 +271,18 @@ void bochs_hw_setformat(struct bochs_device *bochs,
__func__, format->format);
break;
}
+
+ drm_dev_exit(idx);
}
void bochs_hw_setbase(struct bochs_device *bochs,
int x, int y, int stride, u64 addr)
{
unsigned long offset;
- unsigned int vx, vy, vwidth;
+ unsigned int vx, vy, vwidth, idx;
+
+ if (!drm_dev_enter(bochs->dev, &idx))
+ return;
bochs->stride = stride;
offset = (unsigned long)addr +
@@ -277,4 +297,6 @@ void bochs_hw_setbase(struct bochs_device *bochs,
bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
+
+ drm_dev_exit(idx);
}
--
2.18.2
On Tue, Feb 11, 2020 at 10:55:29AM +0100, Gerd Hoffmann wrote:
> Call bochs_unload via drm_driver.release to make sure we release stuff
> when it is safe to do so. Use drm_dev_{enter,exit,unplug} to avoid
> touching hardware after device removal. Tidy up here and there.
>
> Signed-off-by: Gerd Hoffmann <[email protected]>
Still no changelog? I mean if we'd have merge request or something I can
easily check the discussions, but with mailing lists it's all over and I
have 0 memory, so every time I see a patch without history I get to
reconstruct the review history again and figure out where we've been. Gets
old real fast.
-Daniel
> ---
> drivers/gpu/drm/bochs/bochs_drv.c | 6 +++---
> drivers/gpu/drm/bochs/bochs_hw.c | 24 +++++++++++++++++++++++-
> 2 files changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
> index 10460878414e..addb0568c1af 100644
> --- a/drivers/gpu/drm/bochs/bochs_drv.c
> +++ b/drivers/gpu/drm/bochs/bochs_drv.c
> @@ -23,7 +23,6 @@ static void bochs_unload(struct drm_device *dev)
>
> bochs_kms_fini(bochs);
> bochs_mm_fini(bochs);
> - bochs_hw_fini(dev);
> kfree(bochs);
> dev->dev_private = NULL;
> }
> @@ -69,6 +68,7 @@ static struct drm_driver bochs_driver = {
> .major = 1,
> .minor = 0,
> DRM_GEM_VRAM_DRIVER,
> + .release = bochs_unload,
> };
>
> /* ---------------------------------------------------------------------- */
> @@ -148,9 +148,9 @@ static void bochs_pci_remove(struct pci_dev *pdev)
> {
> struct drm_device *dev = pci_get_drvdata(pdev);
>
> + drm_dev_unplug(dev);
> drm_atomic_helper_shutdown(dev);
> - drm_dev_unregister(dev);
> - bochs_unload(dev);
> + bochs_hw_fini(dev);
> drm_dev_put(dev);
> }
>
> diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
> index b615b7dfdd9d..952199cc0462 100644
> --- a/drivers/gpu/drm/bochs/bochs_hw.c
> +++ b/drivers/gpu/drm/bochs/bochs_hw.c
> @@ -4,6 +4,7 @@
>
> #include <linux/pci.h>
>
> +#include <drm/drm_drv.h>
> #include <drm/drm_fourcc.h>
>
> #include "bochs.h"
> @@ -194,6 +195,8 @@ void bochs_hw_fini(struct drm_device *dev)
> {
> struct bochs_device *bochs = dev->dev_private;
>
> + /* TODO: shot down existing vram mappings */
> +
> if (bochs->mmio)
> iounmap(bochs->mmio);
> if (bochs->ioports)
> @@ -207,6 +210,11 @@ void bochs_hw_fini(struct drm_device *dev)
> void bochs_hw_setmode(struct bochs_device *bochs,
> struct drm_display_mode *mode)
> {
> + int idx;
> +
> + if (!drm_dev_enter(bochs->dev, &idx))
> + return;
> +
> bochs->xres = mode->hdisplay;
> bochs->yres = mode->vdisplay;
> bochs->bpp = 32;
> @@ -232,11 +240,18 @@ void bochs_hw_setmode(struct bochs_device *bochs,
>
> bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
> VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
> +
> + drm_dev_exit(idx);
> }
>
> void bochs_hw_setformat(struct bochs_device *bochs,
> const struct drm_format_info *format)
> {
> + int idx;
> +
> + if (!drm_dev_enter(bochs->dev, &idx))
> + return;
> +
> DRM_DEBUG_DRIVER("format %c%c%c%c\n",
> (format->format >> 0) & 0xff,
> (format->format >> 8) & 0xff,
> @@ -256,13 +271,18 @@ void bochs_hw_setformat(struct bochs_device *bochs,
> __func__, format->format);
> break;
> }
> +
> + drm_dev_exit(idx);
> }
>
> void bochs_hw_setbase(struct bochs_device *bochs,
> int x, int y, int stride, u64 addr)
> {
> unsigned long offset;
> - unsigned int vx, vy, vwidth;
> + unsigned int vx, vy, vwidth, idx;
> +
> + if (!drm_dev_enter(bochs->dev, &idx))
> + return;
>
> bochs->stride = stride;
> offset = (unsigned long)addr +
> @@ -277,4 +297,6 @@ void bochs_hw_setbase(struct bochs_device *bochs,
> bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
> bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
> bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
> +
> + drm_dev_exit(idx);
> }
> --
> 2.18.2
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch